A high-voltage LED chip with lateral columnar structure is fabricated in this paper.Compared with the high-voltage LED without lateral columnar structure,its optical power is incre ased by 7.6% under the forward current of 20mA,while its forward voltage and wavelength are unchanged.The relationship s between the current and the voltage as well as the current and the optical power of these two kinds of high -voltage LEDs are also studied. Pachaged white LED testing results show that the luminous efficiency of high-LE D chip with lateral columnar structure is up to 125.6lm/W under the color temperature of 4500K and 20mA driving current.After the 1000h aging test in the conditions of the standard test temperature of 20℃ and the f orward current of 20mA ,the optical power of the high-voltage LED chip with lateral columnar structure just only de clines by 2%.